}

  public void testPutThrows() {
    assertThrows(
        UnsupportedOperationException.class,
        () -> map.put(TypeToken.of(Integer.class), Integer.valueOf(5)));
  }

  public void testPutAllThrows() {
    assertThrows(
        UnsupportedOperationException.class,
        () -> map.putAll(ImmutableMap.of(TypeToken.of(Integer.class), Integer.valueOf(5))));
  }

  public void testEntrySetMutationThrows() {